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The value of tan^-1(1) + cos^-1(-1/2) + sin^-1(-1/2) is (A) π/4 (B) 5π/12

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in Trigonometry by (41.6k points)

The value of tan-1(1) +  cos-1(-1/2) +  sin-1(-1/2) is

(A) π/4

(B) 5π/12

(C) 3π/4 

(D) 11π/12

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1 Answer

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by (41.4k points)
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Best answer

Correct option (C) 3π/4

Explanation:

Alternative Solution: Since

sin-1x + cos-1x = π/2

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