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## Trigonometry Part 3(Solution): Advance math series 2000 most important questions.

Trigonometry Part 3(Solution): Advance math series 2000 most important questions.

Solution 81.(d)

Solution 82.(a)

Solution 83.(c)

Solution 84.(b)

Solution 85.(b) cos 90°=0. Hence result=0

Solution 86.(c)

Solution 87.(b)

Solution 88.(a)

Solution 89.(b)

Solution 90.(b)

Solution 91.(a)

Solution 92.(c)

Solution 93.(b)

Solution 94.(b)

Solution 95.(d)

Solution 96.(b) Let the side of ABC are (a – d), a, (a + d) > 0 is A is smallest and angle corresponding to bigger side is C will be greater.

Hence ratio of three sides = 9a – d) : a : (a + d) = 4d : 5d : 6d = 4 : 5 : 6

Solution 97.(b)

Solution 98.(c)

Solution 99.(d)

Solution 100.(a)

Solution 101.(a)

Solution 102.(a)

Solution 103.(c)

Solution 104.(b)

Solution 105.(b)

Solution 106.(a)

Solution 107.(a)

→sin B . cos A = Cos B – sinA. cosB → sinA. Cos B + cos A. sin B = cos B →sin (A + B)

Solution 108.(d)

Solution 109.(b)

Solution 110.(c)

Solution 111.(c)

Solution 112.(b)

Solution 113.(a)

Solution 114.(b)

Solution 115.(c)

Solution 116.(d)

Solution 117.(a)

Solution 118.(c)

Solution 119.(b)

Solution 120.(d)