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If sin A=(3)/(5) and cos B=(9)/(41),0gl...

If ` sin A=(3)/(5)` and `cos B=(9)/(41),0gltA,Blt(pi)/(2)`, then find the value of the following:
(a) `sin(A+B)` (b) `sin(A-B)` (c) `cos (A+B)` (D) `cos(A-B)`
If `x+y=45^(@)` then prove that:
(a) `(1+tanx)(1+tany)=2` (b) `(cotx-1)(coty-1)=2`

Text Solution

Verified by Experts

The correct Answer is:
(a)`(187)/(205)` (b) `(-133)/(205)` (c) `(-84)/(205)` (d) `(156)/(205)`
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