Question

Asked Jun 7, 2019

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Step 1

To calculate the value of the expression **cos(α+β), sin(α+β)** and **tan(α+β)** under the provided condition which is as **sinα=40/41**, **α** lies in first quadrant, and **sinβ=4/5**, **β **lies in second quadrant.

Step 2

Some formula of trigonometric ratio which is used here is shown below,

Step 3

Now, first find the value of **cos α** and **cos β**. The value of **cos &...**

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