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Find the Exact Value Under the Given Conditions sinα=725,0<α<π2;cosβ=2029,0<β<π2\sin \alpha = \frac { 7 } { 25 } , 0 < \alpha < \frac { \pi } { 2 } ; \quad \cos \beta = \frac { 20 } { 29 } , 0 < \beta < \frac { \pi } { 2 } \quad

question 338

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Find the exact value under the given conditions.
- sinα=725,0<α<π2;cosβ=2029,0<β<π2\sin \alpha = \frac { 7 } { 25 } , 0 < \alpha < \frac { \pi } { 2 } ; \quad \cos \beta = \frac { 20 } { 29 } , 0 < \beta < \frac { \pi } { 2 } \quad Find cos(α+β) \cos ( \alpha + \beta ) .


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