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If cosalpha=(1)/(sqrt5)(0°ltalphalt90^(@...

If `cosalpha=(1)/(sqrt5)(0°ltalphalt90^(@))andcosbeta=(1)/(sqrt10),(270^(@)ltbetalt360^(@))` then the value of `sin(alpha+beta)` is

A

`(1)/(sqrt2)`

B

`(1)/(5sqrt2)`

C

`-(3)/(5sqrt2)`

D

`-(1)/(5sqrt2)`

Text Solution

Verified by Experts

The correct Answer is:
A, B
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